Nicholas Pettas (born January 23, 1973) is a Greek-Danish karateka, former heavyweight kickboxer and actor, who fought out of Team Spirit AE in Tokyo, Japan.

[2] Although an undersized heavyweight, Pettas is known for his powerful low kicks and holds notable victories over Yusuke Fujimoto, Nobu Hayashi, Musashi, Gökhan Saki and Péter Varga.

After getting permission to join the uchi-deshi program, a live-in training of 1000 days, he moved to Japan from Denmark at the age of eighteen.

At the age of twenty-one, he completed the vigorous training course to become the second non-Japanese ever to finalize the program (the first being Judd Reid).

[5] After a decision loss to Ryuta Noji in March 1999, Pettas returned to K-1 to compete in the eight-man tournament at the K-1 World Grand Prix 2000 in Nagoya on July 30, 2000.

He stopped fellow karateka Ricky Nickolson with a low kick in the quarter-finals before going on to face Jérôme Le Banner in the semis.

[8] The peak of Pettas' career came on August 19, 2001, when he won the K-1 Andy Memorial 2001 Japan GP Final at the Tokyo Dome.

He finished Yusuke Fujimoto and Nobu Hayashi with his now-famous low kicks in the quarters and semis, respectively, before advancing to the final to take on Musashi.

Badr Hari greeted him in his second debut at the annual New Year's Eve martial arts event, K-1 PREMIUM 2006 Dynamite!

Pettas wore down Kim, who stood fifteen inches taller than him, with low kicks before dispatching him with punches forty-one seconds into round two.

Kim's fellow Korean Choi Hong-man was only 12.9 inches / 33 cm taller than Mighty Mo when he lost via KO in March 2007.